Asymmetries: In the beginning, most people have an exaggerated perception of the asymmetries. It is largely an illusion due to head tilting and the picture you have in your mind versus the picture others have of you. For example, if your nose turns - we'll say 1 degree to the left - in a traditional mirror you have always seen it turning 1 degree to the right. The first view in the True Mirror, your nose is ending up in a spot that is 2 degrees different than where you are used to seeing it. This goes the same for the head tilt, the one-higher-shoulder, the one-higher-or-bigger-eye and the sides of the mouth's different shapes, turning up or down. Our asymmetries are usually tiny, measured in millimeters, but because most people in western societies have a heightened awareness of their traditional mirror image (due to the easy availability of mirrors in this period of human history), these millimeters seem very apparent during the first few viewings in the True Mirror. Over a short time, with exposure to your non-reversed image, the non-reversed image will become more and more normal, and less and less startlingly asymmetrical. Most people who allow themselves the time to get used to it actually end up preferring it. Your image is friendlier, more normal, and more predictable (it is, after all, just "you" that you are seeing).
Is it true? If you have someone who knows you well stand closely next to you and look at your True Mirror reflection, they will confirm that yes, this is the way you appear. They will not see the exaggerated asymmetries you see, and in fact will not even see your actual asymmetries. What they will see, and which you can finally see also, is the real person that you are - with your expressions, personality, and real emotions all intact. This can be very valuable to you in understanding your interpersonal relations - just how do you come across to others?
Why does it work this way? Eye contact: There are a few key reasons for why the True Mirror reflects the real you. The first is the all-important eye-to-eye contact -- the strongest way we understand what people are saying. When you communicate with every other individual in the world, your eyes always meet left-eye-to-right-eye and right-eye-to-left eye. This normal biological pattern conveys information "just so". With traditional mirrors, where the right eye picks up the right-eye reflection, and the left picks up the left's, you are experiencing a highly unnatural way of gathering information about yourself. You don't communicate with anyone else in the world in that pattern. The result is that we always feel we are somehow different than everyone else, often in a negative way. It is very common for people to feel "I won't join a club that will have me" or "I know there's something wrong with me, no one else seems to see it, but I sure do." Other people report that flat mirrors create uncomfortable or pointless feelings that really don't have any good explanation.